Whilst compiling PowerPoint for 2391 and looking for images of earthing labels I came across this.
http://electricalinstallationwiring...2010/02/1-phase-elcb-connection-pictures.html
I think I will use it for a "spot the issue" instead
http://electricalinstallationwiring...2010/02/1-phase-elcb-connection-pictures.html
I think I will use it for a "spot the issue" instead